Light fixture backplate



FIG. 1 is a perspective view from above of a light fixture backplate in accordance with our design;

FIG. 2 is a top plan view of the light fixture backplate in accordance with our design;

FIG. 3 is a bottom plan view of the light fixture backplate in accordance with our design;

FIG. 4 is a front plan view of the light fixture backplate in accordance with our design; and,

FIG. 5 is a side elevation view of the light fixture backplate in accordance with our design, the opposite side being a mirror image.

The broken lines showing environmental structure are for illustrative purposes only and form no part of the claimed invention. 

The ornamental design for a light fixture backplate, as shown and described. 